Bestfriends Dating

I recently started dating my best friend of 5 years and we haven't had any problems, our families love eachother, his mom and I are always together and he and my mom are always going out. We are both seniors in high school and I am going to college when I graduate and he is joining the air force. I just wanted to ask, is it worth it? Is it worth it for us to keep dating? When he comes back from basic training i'll have already left for college or I am about 3-4 days away from leaving. And then he gets deployed whenever and I won't see him again for a long time. I just am worried that we are going all in for this relationship when distance might ultimately break us.